[Dsg-hallb_magnets] Solenoid MPS water flow operations

[Amrit Yegneswaran]

good work pablo.

thank you for the detailed explanation.

amrit


________________________________
From: Dsg-hallb_magnets <dsg-hallb_magnets-bounces at jlab.org> on behalf of Pablo Campero <campero at jlab.org>
Sent: Wednesday, December 5, 2018 9:58:46 AM
To: dsg-hallb magnets
Subject: [Dsg-hallb_magnets] Solenoid MPS water flow operations

Dear Dr. Rossi,

With regards to the safety operation concerns/questions with the Solenoid MPS, after investigations I can mention the following:

1. Recommended water supply flows and ΔP by Danfysik are:
   1.1.  Flow has to be < 180 [l/min] At ΔP (Sup-Ret) = 6 [Bar].
   1.2. Flow has to be < 115 [l/min] at ΔP (Sup-Ret) = 3 [Bar].

2. Danfysik performed a pressure test for the Solenoid MPS water cooling system at 31 [Bar] for 1 [min], during factory acceptance test protocol on 14/04/2015.

3. The max absolute pressure rated by Danfysik = 12 [Bar].

4. The table below shows a summary of the values for MPS internal flows recommended and the actual flows as of now:


Flow Switch

        Flow Transmitter Dynamic Range [l/min]  Recommended Flows by Danfysik [l/min]   Measured Flows [l/min]
FSW1     1-80   50      67
FSW2     1-15   8.22    8.5
FSW3                     1-80   50      71.87
FSW4     1-15   1.45    1.65
FSW5     1-15   1.45    1.55
Total Flow      --      111.12  150.57


Since actual measured supply flow is 150.57 [l/min] at ΔP (Sup-Ret) = 5.17 [Bar] within the recommended operational values, we can say that the MPS water cooling pressure and flow are safe.
The MPS will not be damaged.



Best Regards,
Pablo

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